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| 荷载作用下沥青路面表面开裂的扩展 | |
| 引用本文： | 车法,陈拴发,李增宏,刘文东,王爱霞.荷载作用下沥青路面表面开裂的扩展[J].公路交通科技,2010,27(5). |
| 作者姓名： | 车法 陈拴发 李增宏 刘文东 王爱霞 |
| 作者单位： | 1. 长安大学,特殊地区公路工程教育部属重点实验室,陕西,西安,710064;山东省淄博市公路管理局,山东,淄博,255038 2. 长安大学,特殊地区公路工程教育部属重点实验室,陕西,西安,710064 3. 山东省淄博市公路管理局,山东,淄博,255038 4. 山东滩坊市公路管理局,山东,潍坊,261031 5. 山东省聊城市公路勘测设计院,山东,聊城,251200 |
| 基金项目： | 山东省交通科技研究项目 |
| 摘 要： | 为了研究荷载作用下沥青路面表面开裂的机理,采用不规则颗粒及颗粒接触界面生成的二维算法子程序,在指定的级配类型范围内随机生成沥青路面仿真体,分别赋予级配碎石颗粒和沥青粘结体相应的材料参数,对刹车荷载作用下沥青路面开裂的细观响应进行了分析。数值模拟结果表明:表面裂纹是随机的产生、裂纹路径的扩展是非连续和跳跃式的,局部裂纹相互干涉最后形成贯通的裂缝微扩展带导致了路面的开裂损坏。模拟结果证明了开裂的非连续性。 |
| 关 键 词： | 道路工程 沥青路面 离散元模拟 路面开裂扩展 |
Analysis of Cracks Propagation on Asphalt Pavement Surface under Load |
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| CHE Fa,CHEN Shuanfa,LI Zenghong,LIU Wendong,WANG Aixia.Analysis of Cracks Propagation on Asphalt Pavement Surface under Load[J].Journal of Highway and Transportation Research and Development,2010,27(5). | |
| Authors: | CHE Fa CHEN Shuanfa LI Zenghong LIU Wendong WANG Aixia |
| Abstract: | In order to ascertain asphalt pavement surface crack mechanism,2D generation algorithm about irregular particle generation and particle contact interface generation was adopted.Asphalt pavement simulations were randomly generated in the designated gradation categories.The material parameters were endowed to graded broken stone irregular particles and asphalt,and the micro-particles response of asphalt pavement surface crack under braking load was analyzed.The numerical simulation results demonstrate that(1)the surface crack is stochastic generated and the crack propagation is discrete as leaps and bounds development;(2)the through crack band due to surface micro-crack interference each other leads to asphalt pavement surface crack.The research result indicates the discontinuous extension of asphalt mixture surface crack propagation. |
| Keywords: | road engineering asphalt pavement surface cracking propagation distinct element simulation |
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